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新型层柱微孔材料─GaW9Z3(Z=Co2+,Fe3+)柱撑Zn

Synthesis,Characterization and Catalytic Activity of New Type Layered Microporous Materials-Pillared Anion Clay by GaW9Z3 (Z=Co ̄(2+),Fe ̄(3+))

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【作者】 张继余余新武张淑云胡长文梁兆君王恩波

【Author】 Zhang Jiyu;Yu Zinwu;Zhang Shuyun;Hu Changwen;Liang Zhaojun;Wang Enbo(Department of Chemistry,Northeast Normal University, Changchun 130024)

【机构】 东北师范大学化学系

【摘要】 新型层柱微孔材料─GaW(Z=Co2+,Fe3+)柱撑ZnAl阴离子粘土的合成、表征及催化性能的研究张继余,余新武,张淑云,胡长文,梁兆君,王恩波(东北师范大学化学系,长春130024)关键词阴离子粘土,杂多化合物,过渡金属,催化性...

【Abstract】 The tungstogallic heteropolyanions trisubstituted with transition metal cobalt and ferrum GaW9Z3 (Z=Co ̄(2+),Fe ̄(3+)) have been incorporated into the interlayer of ZnAl-NO3 type anion clay by means of hydrothermal ion-exchange for the first time in this paper. The layered microporous materials were characterized by XRD,IR,elementary analysis and DTA. Powder X-ray diffraction shows that the aion clay precursor possesses a regular layered structure and a good crystallinity,a nd the pillared derivatives are provided with gallery heights of 0.99±0.01 nm,IR spectra exhibit that the vibration frequencies of heteropolyanions existing in the layered regions of anion clay were similar to those of the authentic heteropoly salts,so we can draw the conclusion that Keggin structure of the gallery heteropolyanions is maintained. Besides,the characteristic peak of at 1384 cm ̄(-1)disappeared,it indicated the intercalation reactions carried out completely.This conclusion is identical with that of XRD and elementary analysis. DTA illustrated that the stability order is:ZnAl-GaW9Fe3>ZnAl-GaW9Co3>GaW9Fe3>GaW9Co3>Znal-NO3.Catalytical tests exhibit that the intercalated derivatives have higher catalytic activity and very high selectivity for esterification reaction of phthalic anhydride with 2-ethyl hexanol.

【基金】 吉林大学无机水热合成开放实验室资助
  • 【文献出处】 分子催化 ,JOURNAL OF MOLECULAR CATALYSIS (CHINA) , 编辑部邮箱 ,1995年04期
  • 【分类号】O69
  • 【被引频次】9
  • 【下载频次】52
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